GNU bug report logs - #1388
23.0.60; Emacs shell problem with echo "1+1" | bc

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Package: emacs;

Reported by: "Jhair Tocancipa Triana" <jhair.tocancipa <at> gmail.com>

Date: Thu, 20 Nov 2008 08:10:03 UTC

Severity: normal

Done: Glenn Morris <rgm <at> gnu.org>

Bug is archived. No further changes may be made.

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Message #6 received at 1388 <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: 1388 <at> debbugs.gnu.org
Subject: Re: bug#1388: 23.0.60; Emacs shell problem with echo "1+1" | bc
Date: Fri, 21 Nov 2008 20:46:53 -0500

"Jhair Tocancipa Triana" wrote:

> Type the following after M-x eshell RET:
>
> echo "1+1" | bc
>
> and then the return key. Instead of the expected answer 2, eshell
> displays:
>
> bc 1.06
> Copyright 1991-1994, 1997, 1998, 2000 Free Software Foundation, Inc.
[...]


I think this is because isatty(0) returns 1 on the right-hand side of
an eshell pipe, so bc thinks it is running interactively. Does anyone
know if that is fixable?
This bug report was last modified 15 years and 183 days ago.

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